Plasmon-Enhanced Radioisotope Thermophotovoltaic (PRTPV) Power Generation for Interstellar Missions

NASA-backed research is exploring a new approach to power generation that could help future spacecraft travel farther with greater efficiency. According to a monitored public feed from NASA Breaking News, Keunhan Park of the University of Utah is proposing the development of a plasmon-enhanced radioisotope thermophotovoltaic system, or PRTPV, designed to outperform current radioisotope thermoelectric generators, known as RTGs.

The concept focuses on turning heat from a radioisotope source into electricity more efficiently than existing space power systems. NASA’s feed summary says the proposed generator aims for a specific power of 17 watts per kilogram and a thermal-to-electric conversion efficiency above 40 percent. Those targets would mark a substantial improvement over the performance typically associated with RTGs, which are valued for their reliability but limited by relatively low efficiency.

If developed successfully, the PRTPV system could become a more compact and powerful option for missions where sunlight is too weak or unavailable, including deep-space and potentially interstellar applications. The proposal’s emphasis on higher specific power suggests a system that could provide more electricity for less mass, a critical advantage for spacecraft design.

The study is listed under NASA’s NIAC Studies program, which supports early-stage concepts with the potential to reshape future exploration technologies. In this case, the proposal centers on using plasmon-enhanced thermophotovoltaic conversion to raise the amount of usable electricity extracted from radioisotope heat sources. That approach is meant to extend beyond the limitations of conventional thermoelectric systems.

The available feed details are brief, but they point to a research effort aimed at improving one of the most important challenges in long-duration spaceflight: dependable power generation far from the Sun. NASA’s public summary presents the PRTPV concept as a transformative energy system, highlighting both efficiency and specific power as key goals.

This article is based on a monitored public feed from NASA Breaking News. Source: NASA Breaking News - https://www.nasa.gov/directorates/stmd/niac/niac-studies/plasmon-enhanced-radioisotope-thermophotovoltaic-prtpv-power-generation-for-interstellar-missions/